Q: Is 577,780 a Prime Number?
A: No, 577,780 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 577780 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 70 140 4,127 8,254 16,508 20,635 28,889 41,270 57,778 82,540 115,556 144,445 288,890 and 577,780, with no remainder.
Since 577,780 cannot be divided by just 1 and 577,780, it is not a prime number.